# test.govlab/context/core/predicates/check.predicate.test.ts

> 16 lines of code and 0 definitions.

Tree: Codebase Testing
Language: typescript
Canonical: https://banes-lab.com/anatomy/testing#file-testing-test-govlab-context-core-predicates-check-predicate-test-ts
Source text: https://banes-lab.com/source/testing/test.govlab/context/core/predicates/check.predicate.test.ts.txt

Listed in [test.govlab/context/core/predicates](https://banes-lab.com/api/source/testing/test.govlab/context/core/predicates.md), after [test.govlab/context/core/predicates/algorithm.predicate.test.ts](https://banes-lab.com/source/testing/test.govlab/context/core/predicates/algorithm.predicate.test.ts.md) and before [test.govlab/context/core/predicates/field.predicate.test.ts](https://banes-lab.com/source/testing/test.govlab/context/core/predicates/field.predicate.test.ts.md).

## Contained in

- [test.govlab/context/core/predicates](https://banes-lab.com/anatomy/testing/folder-testing-test-govlab-context-core-predicates.md)

## Source

```typescript
import { answered, isDeclaredAbsent } from "@govlab/context/core/predicates/check.predicate.ts";
import assert from "node:assert/strict";
import { test } from "vitest";

const WATCHED = "a planted violation";

test("evidence counts as answered only with a known sign, and every other question needs a value", () => {
    assert.equal(answered({ evidence: `contradicted: ${WATCHED}` }, "evidence"), true);
    assert.equal(answered({ evidence: `probably: ${WATCHED}` }, "evidence"), false);
    assert.equal(answered({ authority: "none: the check reads one side only" }, "authority"), true);
    assert.equal(answered({ authority: "none" }, "authority"), false);
    assert.equal(answered(null, "population"), false);
});

test("isDeclaredAbsent holds for an answer that opens with none and a separator", () => {
    assert.equal(isDeclaredAbsent({ observation: "none: decided on source" }, "observation"), true);
    assert.equal(isDeclaredAbsent({ observation: "every run" }, "observation"), false);
    assert.equal(isDeclaredAbsent(null, "observation"), false);
});
```